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Description
Long Tube Header for 1968-74 Oldsmobile Cutlass 5.7/6.6 - Ceramic Coated - 31150FLT FlowTechOverview: Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5 16" flanges with sealing rings for a leak free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat and corrosion resistant metallic ceramic thermal coating that increases exhaust velocity and reduces
Overview:
Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5/16" flanges with sealing rings for a leak-free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat and corrosion resistant metallic ceramic thermal coating that increases exhaust velocity and reduces underhood temps for increased performance.
Features:
- Fuel Economy From The Engine
- Leak Test For Max Performance
- Ceramic Headers
- Rust And Corrosion Resistance
- Mandrel-Formed Power Plenum
- Leakproof O-Ringed Port Seals
- Include All Mounting Hardware
Application:
| Year | Make | Model | Engine | Fitment Notes |
| 1968-1969 | Oldsmobile | 442 | 6.6L V8 400 CID | See Below! |
| 1968-1974 | Oldsmobile | Cutlass | 5.7L V8 350 CID | See Below! |
| 1968 | Oldsmobile | Cutlass | 6.6L V8 400 CID | See Below! |
Fitment Notes:
- Will not fit column mounted standard or floor mounted automatics or Cutlass Supreme models.
- Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat. Flowtech recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating damage.
- The use of header wraps can cause the header tubes to crack or rust due to excessive heat and moisture build-up. Flowtech does not recommend the use of header wraps as this will void the warranty.
- Recommended replacement gasket - Mr. Gasket part# 453
- Must modify exhaust system to retain catalytic converters.
Specs:
| Bolt Size | 3/8-16 x 3/4 In. |
|---|---|
| Brand | Flowtech |
| Collector Diameter | 3.00 inch |
| Emission Code | 4 |
| Engine | Oldsmobile V8 |
| Header Finish | Silver Ceramic |
| Header Style | Long Tube |
| Primary Tube Dia. | 1-3/4 inch |
| Product Type | Headers |
| Tube Material | Mild Steel |
Emissions:
- This part is legal for sale or use on Racing Use Only Vehicles
- The following vehicles are considered Racing Use Only Vehicles:
- Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.
- WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 5
Brilliant
Format: Hardcover
The First State of Being is a brilliant, highly readable middle grade book from the QUEEN of character-driven middle grade literature. This expansive sci-fi feels at once introspective and cinematic, leaping off the page like something made for a movie. This book will help young people and all readers reflect on our past and future as a human community, especially in terms of health advances, animal extinction, and the potential for technological development. It also highlights the love and fight in a mother and the need to view life through a positive lens by focusing most on the present, not our past or future.
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Reviewed in the United States on February 2, 2025
★★★★★ 5
Which Came First?
Format: Hardcover
Of course this won the Newberry award. From the first word, it reminded me of Donna Barba Higuera's The Last Cuentista. A plot so different and imaginative that you wonder how anyone could have thought of it and then carried it out. It's a story of a young boy who is trying to take care of the single mother who seems unable to take care of the family, through no fault of her own. It's a sci-fi fantasy. And it's a story of taking care of each other. At the totally satisfying end I found myself wondering about the chicken and the egg. Thinking I may have to read this one again to see if I can figure it out.
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Reviewed in the United States on March 3, 2025
★★★★★ 5
Perfect Choice
Format: Hardcover
Excellent YA / SCI-FI novel. Pretty well captures the spirit of a 12-year-old boy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 25, 2025
★★★★★ 4
Well-written, twisty novel for middle school children
Format: Kindle
This is Kelly’s second Newbery Medal, the first being for *Hello, Universe* in 2018. Both are well-written novels for middle-grade children and should have a lot of appeal for that age.
It's the year 1999, early fall, an apartment complex in Delaware. 12-year-old Michael is worried that the Y2K bug will cause the collapse of civilization on January 1, 2000. He has been stealing cans of food to create an emergency stash under his bed. He has started a new school, and his only friends are the apartment complex maintenance man and his high-school-age after-school babysitter, Gibby. Michael’s father is dead, and his mother works long hours to make ends meet.
One day a strange kid shows up in the complex, dressed in unusual clothing and asking odd questions like, “What year is this?” It doesn’t take an experienced science fiction reader to suspect that this kid, Ridge, is from the future. He is interested in observing late 20th Century American culture. But he also wants Michael and Gibby to help him figure out how to get back to the future without interfering with the past and thus changing his own timeline. The 1999 part of the story is interspersed with notes about the future and the panicked dialog of Ridge’s family as they try to investigate what happened to him.
It probably doesn’t have many new ideas for adult readers, but it will be surprising and exciting for readers ages 12 and up
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Reviewed in the United States on September 9, 2025
★★★★★ 5
MUST READ!
Format: Hardcover
The First State of Being is set in 1999 during the uncertainty of Y2k. Michael Rosario doesn't have any friends, unless you count Mr. Mosley, the maintenance man in his apartment building, and his babysitter Gibby. Michael worries a lot about the future, his mom, and just about everything else. So when a mysterious teenager (Ridge) shows up near his apartment complex one day, and says he's from the future, Michael is determined to find out what's to become of the world when the year 2000 is here. Will Ridge be able to calm Michael's fears?
Fans of A Rover's Story by Jasmine Warga will love this story about family, friendship, time travel, and facing one's fears. Erin Entrada Kelly's voice makes this novel a must read. It's amazing!
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Reviewed in the United States on April 1, 2024